The FDA told the cannabis company earlier this week that it was "illegally selling" CBD products with "unsubstantiated claims" that the products treat cancer, Alzheimer's disease, opioid withdrawal, pain and pet anxiety.

Curaleaf said upon receiving the agency's letter, the company "immediately began an extensive review of its website and social media platforms to remove all statements that FDA identified as non-compliant." The company said it removed its Curaleaf Hemp blog and third-party links in it, along with pulling statements and social media posts the FDA flagged.

"Curaleaf is committed to being an ethical and responsible company and working with the FDA to be a leader in our industry, setting the standards and guidelines to best service our customers and the communities we serve," CEO Joseph Lusardi said in a statement.

Wakefield, Massachusetts-based Curaleaf sells CBD oils, lotions and pet products. CBD, short for cannabidiol, has been hailed as a treatment for a slew of ailments even though little data supports these claims. Consumer products containing CBD are not federally regulated, and the FDA has vowed to crack down on companies making "egregious" health claims.

The FDA is in the process of evaluating how it might regulate the booming CBD industry. The agency held a day-long meeting at its Silver Spring, Maryland, headquarters in May, where it grilled companies, advocates and scientists for any evidence that CBD actually does anything they claim it does.

A public comment hearing closed earlier this month. The FDA's principal deputy commissioner, Dr. Amy Abernethy, told a congressional hearing on Thursday the agency received 4,492 comments. The agency's next move is expected early this fall.